FarmTek Growers supply GrowSpan Gothic Pro User manual

1
GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
STK# DIMENSIONS
104848CD 18' W x 10' H x 20' L
104849CD 18' W x 10' H x 24' L
104850CD 18' W x 10' H x 28' L
104851CD 18' W x 10' H x 32' L
104852CD 18' W x 10' H x 36' L
©2018 Growers Supply
All Rights Reserved. Reproduction
is prohibited without permission.
Photo may show a different but similar model.
GrowSpan™
Gothic Pro Greenhouses and Systems

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
2Revision date: 06.20.18
READ THIS DOCUMENT BEFORE YOU BEGIN
Thank you for purchasing this GrowSpan™ greenhouse.
When properly assembled and maintained, this product will
provide years of reliable service. These instructions include
helpful hints and important information needed to safely
assemble and properly maintain the greenhouse. Please
read these instructions before you begin.
If you have any questions during the assembly, contact
Customer Service at 1-800-245-9881 for assistance.
SAFETY PRECAUTIONS
• Wear eye protection and head protection.
• Wear gloves when handling metal tubes.
• Use a portable GFCI (Ground Fault Circuit Interrupter)
when working with power tools and cords.
• Do not climb on the greenhouse or framing during or
after construction.
• Do not occupy the greenhouse during high winds,
tornadoes, or hurricanes.
• Provide adequate ventilation if the structure is
enclosed.
• Do not store hazardous materials in the greenhouse.
• Provide proper ingress and egress to prevent
entrapment.
ANCHORING INSTRUCTIONS
Prior to assembling this greenhouse, please read the
MUST READ document included with the shipment.
WARNING: The anchor assembly is an integral part
of the greenhouse construction. Improper anchoring
may cause greenhouse instability and failure of the
structure. Failing to anchor the greenhouse properly
will void the manufacturer’s warranty and may cause
serious injury and damage.
DOUBLE-LAYER FILM INSTALLATION
Greenhouses equipped with a double-layer lm include
a layer that is Infra Red (IR) Retention lm.
IMPORTANT! During cover installation, the IR film
must be installed first! Examine the film and install
it according to the instructions printed on the film.
REQUIRED TOOLS
The following list identifies the main tools needed to
assemble the shelter. Additional tools and supports may be
needed depending on the structure, location, and
application.
• Tape measure or measuring device
• Marker to mark locations on the pipes
• Variable speed drill and impact driver (cordless with
extra batteries works best)
• Metal-cutting saw, hammers and gloves
• Wrenches and impact socket set, or an adjustable
wrench
• Scissors, utility knife, or tin snips
• Adjustable pliers and self-locking pliers
• Ladders, work platforms, and other machinery for lifting
designed to work safely at the height of the building
• Rope/cable for cover installation
UNPACK AND IDENTIFY PARTS
The following steps will ensure that you have all the
necessary parts before you begin to assemble the shelter
frame.
1. Unpack the contents of the shipment and place where
you can easily inventory the parts. Refer to the Bill of
Materials/Spec Sheets.
2. Verify that all parts listed on the Bill of Materials/Spec
Sheets are present. If anything is missing or you have
questions, consult the Pictorial Parts Guide and all
diagrams for clarification, or contact Customer Service.
NOTE: At this time, you do not need to open the plastic
bags containing smaller parts such as fasteners or
washers (if equipped).

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
LOCATION
Choosing the proper location is an important step before
you begin to assemble the structure.
The following suggestions and precautions will help you
determine whether your selected location is the best
location.
• Never erect the structure under power lines.
• Identify whether underground cables and pipes are
present before preparing the site or anchoring the
structure.
• Location should be away from structures that could
cause snow to drift on or around the building.
• Do not position the greenhouse where large loads
such as snow and ice, large tree branches, or other
overhead obstacles could fall.
• Always check local building codes before you begin.
SITE
After choosing a location, proper preparation of the site is
essential. The following site characteristics will help
ensure the integrity of the structure.
• A level site is required. The site must be level to
properly and safely erect and anchor the structure.
• If the site is not level, use footings to provide a secure
base to assemble the structure. Pre-cast concrete
blocks, pressure-treated wood posts, or poured
footings are all acceptable when properly used. (Some
shelters use ground posts or rafter feet.)
• Drainage: Water draining off the structure and from
areas surrounding the site should drain away from the
site to prevent damage to the site, the structure, and
contents of the structure.
WARNING: The individuals assembling this structure
are responsible for designing and furnishing all
temporary bracing, shoring and support needed during
the assembly process. For safety reasons, those who
are not familiar with recognized construction methods
and techniques must seek the help of a qualified
contractor.
QUICK START GUIDE
For a quick overview of this shelter and its components,
consult the Quick Start Guide near the back of these
instructions.
The pages of the Quick Start Guide show exploded views
of all critical connections. Use the diagrams in the Quick
Start section to assemble the frame of your building.
Consult the remainder of these instructions for important
details that will help during the construction.
ASSEMBLY PROCEDURE
Following the instructions as presented will help ensure
the proper assembly of your greenhouse. Failing to follow
these steps may result in an improperly assembled and
anchored greenhouse and will void all warranty and
protection the owner is entitled.
The steps outlining the assembly process are as follows:
1. Verify that all parts are included in the shipment. Notify
Customer Service for questions or concerns.
2. Read these instructions, the Must Read document, and
all additional documentation included with the shipment
before you begin assembling the greenhouse.
3. Gather the tools, bracing, ladders (and lifts), and
assistance needed to assemble the greenhouse.
4. Check the weather before you install the roof cover
and any panels (if equipped). Do not install covers or
panels on a windy or stormy day.
5. Re-evaluate the location and site based on the
information and precautions presented in the
documentation included with the shipment.
6. Prepare the site (if applicable).
7. Assemble the frame components in the order they are
presented in these instructions.
8. Assemble the frame including the struts (if equipped).
9. Consult the MUST READ document and properly
anchor the assembled frame.
10. Install the End Wall framing.
11. Install, tighten, and secure the End Wall end panels
and doors.
12. Install, tighten, and secure the main cover. This applies
to fabric and film covers that stretch over the frame
assembly.
13. Read the Care and Maintenance information at the end
of these instructions.
IMPORTANT: POLYCARBONATE PANELS
Do not allow polycarbonate panels to remain in direct
sunlight prior to installation. Doing so will cause the
protective film to become difficult if not impossible to
remove.
Prior to installation, cover panels using a light colored tarp
to reflect sunlight or store indoors or in the shade.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
4Revision date: 06.20.18
BASEBOARDS AND RIBBON BOARDS
The drop-down curtain requires a ribbon board to secure its
upper section and a baseboard to secure its lower section.
The materials for these components are not included and
are supplied by the customer.
The example
shows the required
ribbon board and
baseboard as
attached to the
frame.
Ribbon Board
Baseboard
A customer-supplied baseboard and retaining board are
also required to attach the curtain's lower edge. See the
exploded view that follows.
The baseboard runs the length of the frame at ground level.
The retaining board secures the curtain to the baseboard.
The baseboard and retaining board are supplied by the
customer.
Fasteners (1/4" x 4" carriage bolts and FA4652 wood
screws) are included. Depending on board width, use 2
carriage bolts per rafter connection for the baseboard and
ribbon board. Evenly space the wood screws at 24".
ATTENTION: Consult the Main Cover Details diagram in
the Quick Start section of this manual to determine where
to install the ribbon board.
The ribbon board consists of two runs of material; the first
is a 2" x 4" or 2" x 6" board attached to the building frame
and the second is a 1" x 4" board attached to the first
board. These boards, when assembled properly, provide
a channel that secures the curtain when it is in the up or
closed position. Boards are secured to the frame using the
supplied 1/4" x 4" carriage bolts and to each other using the
FA4652 supplied fasteners.
End Panel of Shelter
Curtain
Panel
Ground Level
Baseboard and
Retaining Board
Rafter
2" x 6" Board
1" x 4" Board
FA4652
Wood
Screws
1/4" x 4"
Carriage
Bolts
U-Channel
The diagram shows a customer-supplied ribbon board as
attached to the frame.
Secure u-channel to ribbon board using FA4652 wood
screws spaced at 16" on-center.

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
The following graphics and photos will help you identify the
different parts and show you how they are used. (Some
parts are not shown.)
Swaged
Plain
Swaged and Plain Rafter Sections
FAH320B & FALB32B
Carriage Bolt & Hex Nut
102198
U-Channel Spring
CC6212
Fabric Clip
FA4482B
Tek Screw
QH1402
Band Clamp
102548
Cross Connector
104074
Square-to-Round Tube
Connect Bracket
102856
End Clamp
FAH009B & FALB01B
Carriage Bolt & Hex Nut
103496
Gearbox
104624
Square Tube Fitting
QH1330
Angle Bracket
102197
Aluminum
U-Channel
104213
Aluminum
U-Channel Profile
104548
End Cap Profile
Doors/Fans/Vents
102570
Aluminum Channel
Aluminum 8'
H-Channel Profile
102717
Gearbox Drive
103544
Mounting Plate
102569
Bearing
102921 & FA4484B
Neo-bonded Galvanized
Washers and Long Tek Screws
106734 Band Clamp AS5020 Pulley

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
6Revision date: 06.20.18
H-CHANNEL INSTALLATION INSTRUCTIONS
The new H-channel design requires installation of the at side facing out with channel side toward
the building. Some diagrams and photos in this document show installation of original H-channel with
channel side facing out. Design of new H-channel does not allow channel-side out installation.
Use the diagrams on this page to install H-channel with at side facing out.
ATTENTION: Use only 1-1/2" Tek screws to attach H-channel to building frame. Do not use
shorter screws. They will not hold. Do not use washers on Tek screws when installing
H-channel.
ATTENTION: Install all twin-wall poly carbonate panels with UV-protected side toward the sun.
UV-protected side
toward sun.
Install 1-1/2" Tek screws through
H-channel into building frame.
H-Channel
Center Groove
Flat side toward the sun.
Flat
Side
Channel

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
End Rafter
Interior
Rafter
Baseboard is
supplied by
customer.
Ground
Level
ATTENTION: Position purlins evenly during the
frame assembly. Use the rafter pipe joints as
guides when installing the end clamps, cross
connectors, and purlins.
Purlins
Ground
Post
Frame length may differ from actual frame.
GrowSpan™
Gothic Pro Greenhouses and Systems
OVERVIEW
This section describes assembling your greenhouse. For
details, please see section, Assembling the Gothic Pro
Greenhouse Components. See illustration below to identify
main parts of greenhouse.
1. Locate the required parts for each assembly procedure.
2. Assemble the rafters and frame, and square the frame.
3. Prepare and attach end panels.
4. Attach main cover and Twist-of-the-Wrist assembly.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
8Revision date: 06.20.18
LAY OUT THE BUILDING SITE
After the site is prepared, lay out the building site.
Taking these steps before assembling the shelter saves
time and ensures that the structure is positioned as
desired.
Ground posts must be driven to the proper depth. Width of
the shelter is measured from the center of one ground post
to the center of the remaining ground post.
SQUARE THE SITE
Gather the Parts:
• Ground Posts
• 5/16" x 2-1/2" Machine Bolts
• 5/16" Nuts
1. Identify a corner where a ground post will be positioned
and drive the first ground post into the ground.
NOTE: Insert the ground post driver into the top of
the ground post to protect the post and drive the post
into the ground. The top of the post will be one (1) foot
above the finished grade when properly driven.
3. Use a transit or line level to drive the second corner
post to the same depth as the first ground post.
4. String a line at least as long as the building from the
first stake at 90°.
NOTE: A transit can be used to ensure an accurate 90°
angle, or the 3-4-5 rule can be used. Refer to diagram.
Using multiples of 3-4-5 such as 6-8-10 or 12-16-20
helps to maintain an accurate 90° angle.
5. After squaring the position of the building, measure
the length (center-to-center) and drive the next corner
ground post.
6. Repeat the same step for the last corner post.
NOTE: The distance measured diagonally between
corner posts must be equal for the building to be
square.
7. Check all dimensions (and adjust if needed) before
driving the remaining posts to the required height.
8. After all corner posts are accurately installed, tie a
string line between the tops of the corner ground posts
on the same side of the shelter. The string is used to
identify the tops of all remaining ground posts. The
string must remain tight and level.
9. Use a tape measure to mark the 48" on-center
locations of the remaining ground posts.
10. Drive the remaining ground posts into the ground at the
required 48" on-center width and the height identified
by the string.
NOTE: Verify that the holes in the ground posts are in
the proper position and that each post is plumb and
driven to the correct depth.
11. Continue with the Rafter Assembly steps that follow.
ATTENTION: Position the pre-drilled holes facing to the
inside/outside of the shelter so they can be aligned with
the bolt holes in the rafter legs.
To align the bolt holes in the ground posts with those
in the rafter after driving the ground posts, insert a
tapered rod or pry bar into a ground post bolt hole and
turn the post using the rod or pry bar.
2. After the first corner ground post is in place, string a
line the width of the building (center-to-center) and
drive the second ground post into the ground just
enough to hold it in place.
Outside of
Shelter
Inside of
Shelter
Ground
Post

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
ASSEMBLING THE GOTHIC PRO GREENHOUSE
FRAME COMPONENTS
After the site is prepared and an inventory of parts is
complete, continue with the rafter assembly.
NOTE: All rafter assemblies consist of rafter tubes and
purlin clamps. Consult the rafter diagram in the Quick
Start section of these instructions before and during the
rafter assembly process.
Assistance is required to assemble the greenhouse frame.
RAFTER ASSEMBLY
Gather the Parts:
• Rafter Pipe (#18G16A)
• Rafter Pipe (#18G16B)
• Rafter Pipe (#166S075)
• End Clamps (#102856)
• Tek Screws (#FA4482B)
• Magnetic nut setter (3/8'' x 2-9/16")
END RAFTER ASSEMBLY
The end rafters include purlin end clamps and band
clamps. Install the purlin end clamps before the different
pipes of the rafters are connected. The band clamps for the
side struts are installed when the two (2) end rafters are set
onto the ground posts.
1. Select the five (5) pipes needed to assemble the first
end rafter and arrange on a level surface.
2. Slide four (4) end purlin clamps (two on each side of
the peak) over the rafter pipes. Position all end clamps
at the rafter pipe joints. Position the end clamps as
shown.
(#18G16A)
(#166S075)
(#18G16B)
NOTE: Position all purlin clamps at the rafter pipe
joints. Consult the Quick Start section for additional
information.
3. After slipping the clamps over the rafter pipes, insert
the swaged end of the rafter pipes into the plain ends
of the pipes to assemble the rafter.
4. Once the rafter is assembled, reposition the purlin
clamps over the pipe joints and install a Tek screw
through the rafter pipes to secure each joint.
IMPORTANT: To prevent damage to the cover and end
panels (if equipped), position the Tek screws so the
heads do not contact the cover when it is installed.
5. Repeat steps for to assemble the remaining end rafter
and set both end rafters aside.
End clamp as seen from inside the assembled frame.
End clamp as seen from inside the assembled frame.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
10 Revision date: 06.20.18
(#18G16A)
(#166S075)
(#18G16B)
INTERIOR RAFTER ASSEMBLY
Complete the following steps for the interior rafters.
1. Select the pipes for the first interior rafter assembly and
position these on the ground as shown.
IMPORTANT: Interior rafters do not use end clamps.
Instead, cross connectors are attached during the
frame assembly.
2. Insert the swaged ends of the rafter pipes into the plain
ends of the pipes and secure each joint with a Tek
screw.
NOTE: For longer frames, it may be easier to assemble
a few rafters at a time and then begin to assemble the
frame. Position Tek screws so they will not contact the
cover when the frame is assembled.
3. Once rafters are assembled, assemble the frame.
FRAME ASSEMBLY
After all ground posts are driven in place and rafters are
assembled, assemble the frame.
NOTE: The baseboards (strongly recommended) shown in
the diagrams throughout these instructions are not included
and must be supplied by the customer.
Contact Customer service at 1-800-245-9881 to purchase
baseboards, or for additional information.
ASSEMBLE AND PRE-MARK THE PURLINS
The following steps describe one way to speed the
assembly process and eliminate the need to measure each
purlin as it is installed. Pre-marking the purlins ensures that
an accurate spacing of the rafter assemblies is achieved
and maintained during assembly.
Gather the Parts:
• Pipe 1.315'' x 75'' swaged (#131S075)
• Pipe 1.315'' x XX'' plain (#131P0XX)
• Marker and tape measure
NOTE: The purlins are part of the assembled frame and
run perpendicular to the rafter assemblies. Each purlin
consists of 1.315" x 75" (#131S075) swaged pipes (number
is determined by shelter length) and one (1) 1.315" x XX"
(#131P0XX) plain pipe.
ATTENTION: The XX" represents the remaining length
required to reach the end of the shelter. Consult the Spec
Sheet for part identification.
1. Select the required pipe sections for one purlin and
connect these by inserting the swaged ends of the
pipes into the plain ends until the entire purlin is
assembled.
NOTE: Assemble the purlins in a location that is
accessible during the assembly of the frame, but will
not interfere with the process of lifting and setting the
rafters.
2. Verify that each pipe joint is properly seated.
NOTE: These pipes must be separated during the
assembly procedure. Do not fasten them together at
this time.
3. For the 48" rafter spacing, measure forty-eight and
three-quarters inches (48-3/4") from one end of the
assembled purlin and mark the distance on the pipe.
NOTE: This first measurement is three-quarters (3/4)
of an inch longer than the on-center rafter spacing
to account for the length of purlin pipe that extends
through the end purlin clamp of the first end rafter.
RAFTER ASSEMBLY (continued)

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
FRAME ASSEMBLY (continued)
4. From the location marked in the previous step,
measure forty-eight inches (48") and make another
mark on the assembled purlin.
5. Continue to mark the purlin in 48" intervals until all
locations are marked. These marks help to maintain
the 48" on-center rafter spacing of the shelter during
assembly.
6. Repeat this procedure until all assembled purlins are
marked.
7. After assembling all rafters and pre-marking the purlins,
assemble the frame.
ASSEMBLE THE FRAME
After all ground posts are driven in place, rafters are
assembled and purlins pre-marked, assemble the frame.
Gather the parts:
• All rafter assemblies and pre-marked purlins
• Band clamps (#QH1402)
• Cross connector (#102548)
• 5/16" x 2-1/2" machine bolts and 5/16" nuts
• Lifts, ladders, and assistants
• Rope or cable
1. Carefully stand the first end rafter, slide a band clamp
onto each rafter leg, and place the leg pipes in the first
set of ground posts.
Brace the rafter in place to keep it straight. Depending
on the frame size, a lift and additional assistants may
be needed. Consult Quick Start section for details.
Rafter shown differs in design.
2. Secure the leg pipes to the ground posts using the
5/16" x 2 1/2" machine bolts and nuts.
Inside of
Shelter
Outside of
Shelter
Rafter
Ground
Post
Band
Clamp
Rafter shown differs in design.
ATTENTION: Stand the rafter so the nuts and bolts of
the end clamps are to the inside of the frame.
3. Use rope or cable to keep the rafter in position.
4. Carefully position the first interior rafter in place and
secure the leg pipes to the ground posts.
Rafter shown differs in design.
1st Interior Rafter
End Rafter

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
12 Revision date: 06.20.18
FRAME ASSEMBLY (continued)
5. As the second rafter is steadied, remove one section of
pipe from one assembled purlin.
NOTE: Work from the end of the purlin where the
first measurement was taken during the pre-marking
procedure.
6. Insert the purlin pipe through an upper end clamp of
the end rafter and through a cross connector placed in
the same position on the interior rafter. Consult Quick
Start section for purlin location per frame.
7. Align the plain end of the purlin with the center of the
end rafter and rotate the purlin pipe so that the first
mark is visible (near the clamp of the interior rafter).
8. Tighten the end clamp and secure it to the rafter with a
Tek screw.
9. Install Tek screw through end clamp and into the purlin
pipe.
Purlin
End Rafter
10. Move to the interior rafter and align the mark on the
purlin with the center of the rafter to maintain the proper
spacing.
Interior Rafter Align mark with
center of rafter.
Purlin
11. Verify that the rafter spacing is forty-eight inches (48")
on-center (adjust as needed) and tighten the cross
connector.
12. Secure the cross connector to the rafter using a Tek
screw. See Quick Start section if needed.
13. Repeat Steps 6-12 to install the first section of each
purlin assembly for the first two rafters.
14. Choose another interior rafter assembly and set it
in position. DO NOT USE THE REMAINING END
RAFTER.
15. Secure the rafter legs to the ground posts as previously
described and steady the rafter.
16. Remove another section of purlin pipe from each pre-
marked purlin assembly and attach these to the rafter.
17. Verify that the distance between the rafters is 48"
center-to-center. Adjust the rafter forward or backward
as needed to maintain this dimension.
Interior Rafter
End Rafter
Do not allow the
purlin to extend
beyond the end
rafter.
End rafter view Interior rafter view
18' wide
center-to-center
Dashed line
shows ground
level.
Frame shown may differ slightly from actual frame.

13
GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
18. Secure the purlin pipe joint with a Tek screw.
19. Repeat the above steps as needed to stand and secure
the remaining interior rafters and purlins to complete
the frame assembly.
20. Slide a band clamp onto each leg of the remaining
end rafter, secure the rafter to the ground posts, and
attach the purlins to it. Verify that the end clamps are
positioned with the nut and bolt to the inside of the
assembled frame. Refer to the Quick Start section and
previous diagrams if needed.
NOTE: If the last end rafter is plumb and the purlin
extends beyond the end of the rafter, cut the last
section of purlin pipe to the required length.
FRAME ASSEMBLY (continued)
Dashed line shows
ground level.
Frame shown may differ slightly from actual frame.
21. Once all rafters are set and all purlins are in place and
secure, return to each pipe splice of each purlin and
verify that a Tek screw is installed. Install a Tek screw if
needed.
22. Remove any temporary bracing (if needed) and install
the baseboards and the side struts.
BASEBOARD INSTALLATION (RECOMMENDED)
The baseboard (strongly recommended) is supplied by the
customer and is attached at ground level along both sides
of the frame. It helps keep the ground posts in place and
also prevents the frame from working into the ground when
anchored.
Attach the baseboards to the frame on the outside of the
ground posts at this time.
Gather the Parts
• Treated or recycled plastic lumber (supplied by
customer).
• 1/4" x 4" Carriage Bolts and 1/4" Nuts
NOTE: The following procedure describes one way to
install the recommended baseboards. The size and
type of the baseboard chosen may require the use of
alternative steps. When properly installed, baseboards
run the length of the frame.
NOTE: The boards should be at ground level or slightly
into grade to prevent the shelter from sinking and to
create a seal along the bottom. After installing the
baseboards, continue with these instructions.
Ground
Level
Inside of
Shelter
Outside of
Shelter
On the outside of the frame, attach the first baseboard to
the ground posts using the 1/4" x 4" carriage bolts and
nuts. Continue adding baseboards to complete the first run.
Splices are made between posts as shown. Use a short
section of baseboard to secure separate baseboards at a
splice.
If the recommended baseboard (customer-supplied) is not
used, secure the required diagonal struts to the ground
post using a Tek screw or other customer-supplied fastener.
The installation of the diagonal struts is described as
follows.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
14 Revision date: 06.20.18
SIDE STRUT INSTALLATION
There are four (4) side struts for the shelter. These struts
are positioned between the end rafters and the first interior
rafter on each side of the shelter.
Complete these steps to install the four (4) side struts:
Gather the Parts
• Struts
• Band Clamps (#QH1402)
• Lag screw or nut and bolt (supplied by customer)
1. Locate one strut and position it between one end rafter
leg and the leg of the first interior rafter as shown
below.
Strut
End Rafter
Interior
Rafter
Baseboard is required
for this procedure.
Customer supplies the
baseboard.
Ground Level
2. Attach one end of the strut to the band clamp as shown
in the diagram below.
Strut
End Rafter
Band Clamp
3. Attach the remaining end of the strut to the baseboard
using a lag screw or nut and bolt (not included). See
the diagram that follows for location.
NOTE: A baseboard provides a place to attach each
strut and helps keep the ground posts at the required
depth. The customer is responsible for providing a
baseboard for this frame. If no baseboard is present,
attach the strut to the ground post using a Tek screw or
other customer-supplied fasteners.
4. Repeat the above steps to attach the remaining side
struts to the shelter.
5. After securing the struts, verify that all clamps are
secured with a Tek screw to the rafters.
6. Verify that each pipe splice (purlin and rafter) is
secured with a Tek screw.
7. Complete the next procedure to anchor the assembled
frame.
ANCHOR THE ASSEMBLED FRAME
At this point, anchor the greenhouse frame. Consult the
MUST READ document for anchoring information and
suggestions. Please call customer service at 1-800-245-
9881 for additional anchoring information.
CAUTION: The anchor assembly is an integral part of
the greenhouse construction. Improper anchoring may
cause instability and failure of the structure to perform
as designed. Failing to anchor the shelter properly
will void the manufacturer’s warranty and may cause
serious injury and damage.
Photo shows the strut attached
to the inside of the customer-
supplied baseboard.
Attach strut
as shown.
End
Rafter
Ground Level
Baseboard
NOTE: Head of bolt on the band clamp must face the
toward the outside of the shelter.

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GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
END WALL INSTALLATION
The steps to install the greenhouse end walls (front and
back) are identical and include the following:
1. Install end wall framing. (See the diagrams in the Quick
Start section at the back of these instructions. Read the
installing accessories note below.)
2. Prepare polycarbonate end panels and attach.
3. Assemble doors and attach.
INSTALL END WALL FRAMING (Front and Back)
Site variations and different methods for anchoring the
greenhouse may require slight changes to be made to
these instructions. It is the responsibility of the owner/
builder to adapt these instructions as needed to adjust for
these and other differences.
A NOTE ABOUT INSTALLING THE END WALL
FRAMING FOR OPTIONAL HEATERS, VENT FANS, AND
MOTORIZED SHUTTERS (if equipped):
Optional accessories such as heaters, vent fans and
motorized shutter units are typically installed in the end
walls of this greenhouse. Additional horizontal framing
(included) is installed between the vertical end wall frame
tubes to mount these accessories. The spacing shown for
the end wall supports on the end frame diagrams may be
too narrow for the installation of some larger accessories.
When framing the end wall, consult the installation
instructions for the accessories (if equipped), or measure
the width of the accessory to accurately space and position
the end frame tubes.
Consult the panel installation diagrams in the Quick Start
section to identify the verticals that can be moved.
MOVE ONLY THE VERTICAL SUPPORTS LABELED
AS NON-CRITICAL.
Before installing any greenhouse accessory, adhere to the
following:
• Consult the end frame diagrams before installing the
accessory horizontal framing.
• Move only those verticals labeled as "NON-CRITICAL"
on the end frame diagrams when deciding where to
install the additional horizontal framing for accessories.
• Consult the diagrams in the Quick Start section
showing the polycarbonate panel locations and the
locations of the aluminum trim and profile before
repositioning any end wall vertical.
• DO NOT REPOSITION THE END WALL VERTICALS
USED AT THE SEAM OF TWO (2) POLYCARBONATE
PANELS.
• Always consult the installation guides that shipped
with the accessory for additional precautions,
recommendations, and safety requirements.
• Before installing any electrical accessory, consult a
professional electrician for precautions and additional
assistance.
• For gas heaters, a professional, qualified service
technician must install the unit.
Complete these steps to install the accessory framing:
1. Based on the installation requirements and precautions
of the accessory, choose a location in the end wall to
mount the accessory, and cut a 1.5" x 1.5" frame tube
to the required length for framing.
2. Attach these horizontal frame tubes between the
vertical frame tubes of the end wall (at the required
height determined by the installation instructions
included with that accessory) using angle brackets.
INSTALL THE END WALL FRAME
Refer to the end frame diagrams (Quick Start section).
The materials and parts needed to assemble the end wall
frame include:
• Square Tube (#102897)
• Angle Brackets (#QH1330) & Band Clamp (#QH1402)
• Square Tube Fitting (#104624)
• Square-to-Round Tube Connect Bracket (#104074)
• Carriage Bolt (#FAH320) and Nut (#FALB32B)
• Tek Screws (#FA4482B)
1. Locate the square metal tubing for the base tube of the
end wall. The base tube consists of 99" swaged tubes
and one (1) short section cut from a length of square
pipe. See Quick Start section for clarification.
2. Insert the swaged ends of the tubing into the plain ends
to connect the pieces, measure, and cut to length.
3. Position this assembled base tube on the ground
between the legs of the end rafter at the front of the
greenhouse and anchor it in place. This base tube will
be directly below and in line with the end rafter.

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4. Secure the base tube between the legs of the end
rafter using an angle bracket and Tek screws.
INSTALL THE END WALL FRAME (continued)
The bracket
shown in this
diagram can
be installed
with either its
short section
(as shown) or
the long section
attached to the
ground post.
Base Tube
Ground
Post
5. On the base tube surface facing the inside of the
greenhouse, install a short Tek screw at each joint and
then locate and mark the center of the base tube.
6. Consult the End frame diagram (Quick Start section)
and mark the rough opening for the width of the door
assembly.
7. Place the band clamps on the end rafter above the
door as shown below. DO NOT TIGHTEN THE BOLTS
AT THIS TIME.
ATTENTION: The frame shown below may differ from
the end wall frame. Consult the diagrams in the Quick
Start section to view the frame for this shelter.
8. Select the tubing for the two vertical frame supports for
the sides of the door. Each support includes:
• One (1) long 99" section of square tubing (#102897
swaged end)
• One (1) short section of square tubing (if needed).
This is cut from a swaged end tube (#102897).
• One (1) square-to-round tube bracket (#104074)
9. Measure the distance between the top of the base tube
and band clamp (Step 7) to determine the length of the
first door jamb.
NOTE: If the measured length is longer than 99", an
additional section of square tubing is required (see
Step 10). If the distance is 99" or shorter, skip to Step
11.
10. Choose one (1) square tube (#102897), insert the
swaged end of the long tube into the plain end of
another tube and tap with a hammer to properly seat
the tubes at the joint.
11. On the door jamb, mark the length determined in Step
9 (above) and subtract the amount needed to account
for the square-to-round tube connect bracket, which is
attached to the top of the door jamb. See the diagram
that follows.
12. Select a square-to-round tube connect bracket and
attach the bracket to one end of the door jamb. Use a
5/16" drill bit to drill a hole through the tube and attach
the bracket to the tube using a nut and carriage bolt.
13. Repeat Steps 9-12 for the remaining door jamb.
14. With the square-to-round tube connect bracket
attached to the top of each door jamb, use the bolt
in the band clamp to attach the bracket to the band
clamp. DO NOT TIGHTEN AT THIS TIME.
NOTE: The heads of the bolts for each clamp are to the
outside (or front/back) of the greenhouse. At this point,
the two door jambs should be loosely attached to the
end rafter assembly.
End Rafter
Square-to-
Round Tube
Connect
Bracket
Front (or outside)
of the greenhouse
Door jamb

17
GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
15. Using the marks on the base tube for the rough
opening for the door (Step 6), attach the bottom of one
(1) door jamb to the base tube using an angle bracket.
Consult the end frame diagram.
INSTALL THE END WALL FRAME (continued)
16. Using a level (or other means), verify that one door
jamb is plumb and tighten the band clamp bolt to lock
the first door jamb in place.
17. Take the door and set it in place on the bottom end wall
frame tube between the secured vertical door jamb and
the loose door jamb.
18. With the door centered in the rough opening, swing
the loose door jamb back into position and secure
the bottom of the door jamb to the base rail using Tek
screws and an angled bracket.
NOTE: Verify that the door jamb is plumb before
installing the Tek screws and adjust if needed.
19. Choose the square tube for the door frame header and
cut the swaged end to the proper length for the width of
the rough door opening.
20. Using two angle brackets, attach the header tube to the
end wall assembly between the door jambs as shown
below.
21. Verify that both door jambs are plumb and recheck the
width of the door opening at the top and bottom. Adjust
if needed.
NOTE: Do not secure the door to the door jambs at
this time.
22. Use the end frame diagram to determine the number of
remaining vertical end frame supports and place one
band clamp on the end rafter for each of the remaining
vertical supports. Use the diagram for the location of
these clamps.
23. Using the end frame diagrams (Quick Start section),
measure and mark (on the base tube) the locations of
the remaining vertical end wall supports.
ATTENTION: The frame of the door is designed to
"wrap around" the door jambs of the end wall. Diagram
below shows how the door is installed.
Door Opening
Angle Bracket
Mark
Base Tube
Center of
Door jamb
ATTENTION: The
door jambs sit
within the frame
channel of the
door. The header
tube will sit on top
of the installed
door.
Frame shown may differ slightly from actual frame.
Header
Door Trim
Door Jamb
TOP VIEW OF DOOR

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24. Choose the parts for each remaining vertical support
for the end wall framing. Each vertical support consists
of the following parts:
INSTALL THE END WALL FRAME (continued)
25. Use the steps presented earlier in these instructions
and the end frame diagrams to measure and cut each
section of square tubing for the remaining vertical
frame members.
• Square tube: Longer verticals may require an
additional shorter length cut from a longer tube.
• One (1) square tube fitting (#104624) to attach the
support to the base tube of the end wall assembly.
• One (1) square-to-round tube connect bracket
(#104074) to attach the tubing to the band clamp
on the end rafter.
Front (or outside)
of the greenhouse
Square-to-
Round Tube
Connect
Bracket
Band Clamp
Position all screws, bolts
and clamps so they will
not damage the end wall
panels when panels
are attached to the
end wall frame.
End Rafter
ATTENTION: Remember to subtract the amount
needed to account for the square-to-round tube
connect bracket that will be attached to the top of each
remaining frame member.
26. Choose a square-to-round tube connect bracket and
attach the bracket to one end of the vertical frame
member. Use a 5/16" drill bit to drill a hole through the
tube and attach the bracket to the tube using a nut and
carriage bolt.
27. With the square-to-round tube connect bracket
attached to the top of the frame member, place a
square tube fitting on the bottom of the frame member.
Center Mark
28. Align the center of the assembled frame member with
the center mark on the base tube and attach the top of
the frame member to the band clamp on the rafter. Do
not tighten.
29. Verify that the vertical end wall frame member is plumb
and use the short Tek screws to secure the square tube
fitting to the base tube.
30. Tighten the top band clamp and install a short Tek
screw through the clamp and into the rafter.
31. Repeat the procedure as needed to assemble and
install the remaining vertical end wall supports.
32. Return to the bottom of each frame member and install
a short Tek screw through the back or side of each
tube fitting to secure the end frame support to the tube
fitting.
Inside view
of end rafter
33. Once each end wall is assembled, return to each band
clamp and pipe splice of each base tube and verify that
a Tek screw is installed. Install a Tek screw if needed.

19
GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
Revision date: 06.20.18
INSTALL FRAMING FOR ACCESSORIES (OPTIONAL)
Complete these steps to install the accessory framing:
1. Read the note regarding the installation of optional
accessories at the beginning of the end wall installation
section.
2. Based on the installation requirements and precautions
of the accessory, choose a location in the end wall
where you can mount the accessory, and cut two (2)
1.5" x 1.5" frame tubes to the required length. Consult
the End Wall Diagram.
3. Attach these horizontal frame tubes between the
vertical frame tubes of the end wall (at the required
height determined by the installation instructions
included with that accessory) using QH1330 brackets.
Dashed lines show where additional frame tubes are
installed. If you are not installing any accessories the
accessory framing is not needed.
INSTALL THE END WALL FRAME (continued)
TAPE SHARP EDGES AND CONNECTORS
After the frame is assembled, check the frame for sharp
edges that could damage the cover or end panel, and file
these smooth or tape over them using the supplied duct
tape.
In addition, return to the rafters and apply tape over
each connector to better protect the cover film when it is
installed. The following photo shows one way to apply the
tape.
Rafter and frame shown
may differ from actual frame.
Photo is used to illustrate
how to apply tape. Duct
tape over
connector
Space below is reserved for customer notes.

GROWSPAN™GOTHIC PRO GREENHOUSES AND SYSTEMS
20 Revision date: 06.20.18
END PANEL INSTALLATION
After end wall framing is installed, attach polycarbonate
panels. Steps that follow describe one way to complete the
end wall panel installation.
Materials and parts needed to assemble end panels
include:
• Polycarbonate panels and white vent tape
• Aluminum U-channel profile (104213)
• Aluminum End Cap provile (104548)
• Aluminum 8' H-channel (113236Z096)
• Tek screws (FA4484B)
• Neo-bonded, galvanized washers (102921B)
Read the following information before starting:
• U-channel profile is used to finish the sides and top
edges of the polycarbonate panels.
• H-channel is used to join two (2) separate
polycarbonate panels at the seam.
• Tek Screws and galvanized washers are used to
secure aluminum channel and panels to end wall
frame.
• Install the polycarbonate panels with the UV-protected
side to the outside. Mark this side with a marker if
needed after removing the protective film.
ATTENTION: The protective film must be removed
from the polycarbonate panels. Allowing the film to
remain intact and in direct sunlight will make the film
difficult if not impossible to remove.
• During preparation, rest the edges of the panels on
cardboard or other material to protect them from dirt
and damage.
• Seal the bottom edge of the panels with white vent
tape.
• Consult the polycarbonate panels (Quick Start section)
for the location and lengths of each panel. The
diagrams are located at the back of these instructions.
ATTENTION: Panels must be position as shown on the
panel diagrams. Using a panel in the incorrect place can
affect the placement of subsequent panels. In addition, the
amount of aluminum profile used between panels and to
finish the panel edges may not be adequate if additional
seams are created. Begin at the door end of the building.
NOTE: Install all accessories (fans, vents, heaters, etc.)
after installing all polycarbonate sheets.
Secure all polycarbonate panels as shown in the diagrams
and photos below, unless otherwise noted.
GLAZING PANEL
8MM POLYCARBONATE
PANEL SPLICE "H" CHANNEL
TEK SCREW
END WALL FRAME TUBE
END WALL FRAME TUBE
TEK SCREW & NEO-BONDED WASHER
Use a Tek screw and washer to secure panel to end wall
frame. Do not crush panel when installing screws.
Diagram shows basic panel installation and fasteners used
to secure polycarbonte panels. Install H-channel with flat
side out.